PRTG Manual: SSH INodes Free v2 Sensor
The SSH INodes Free v2 sensor monitors the free index nodes on disks of Linux/Unix and macOS systems via Secure Shell (SSH).
This sensor is in beta status. The operating methods and the available settings are still subject to change. Do not expect that all functions work properly, or that this sensor works as expected at all.
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
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Consider the following remarks and requirements for this sensor:
Requirement |
Description |
---|---|
This sensor requires that the Beta Sensors experimental feature is enabled. For more information, see the Knowledge Base: What are beta sensors and how can I use them? |
|
Credentials |
This sensor requires credentials for Linux/Solaris/macOS (SSH/WBEM) systems in the settings of the parent device. |
Distributions |
This sensor does not support all Linux/Unix and macOS distributions. |
ESX(i) hosts |
This sensor does not support ESX(i) hosts. |
File Systems |
This sensor does not support udev and overlay file systems. |
IPv6 |
This sensor supports IPv6. |
Performance impact |
This sensor has a low performance impact. |
Scanning interval |
The recommended scanning interval of this sensor is 5 minutes. |
Multi-platform probe |
You can add this sensor to a multi-platform probe. |
Knowledge Base |
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The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
- ssh
- sshinodesfreesensor
For more information about basic sensor settings, see section Sensor Settings.
Setting |
Description |
---|---|
Connection Timeout (Sec.) |
Define a timeout in seconds for the connection. This is the time that the sensor waits to establish a connection to the host. Keep this value as low as possible. The maximum timeout value is 300 seconds (5 minutes). The default timeout value is 10 seconds. Enter an integer. Make sure that the connection timeout is a value that is higher than the shell timeout to avoid potential errors. |
Shell Timeout (Sec.) |
Define a timeout in seconds for the shell response. This is the time in seconds the sensor waits for the shell to return a response after it has sent its specific command (for example, cat /proc/loadavg). The maximum value is 300 seconds (5 minutes). The default timeout value is 10 seconds. Enter an integer. Make sure that the shell timeout is a value that is lower than the connection timeout to avoid potential errors. |
SSH Port Inheritance |
Define which port this sensor uses for the SSH connection:
|
Custom SSH Port |
This setting is only visible if you select Do not inherit port (enter a custom SSH port) above. Enter the port number (between 1 and 65535) that this sensor uses for the SSH connection. The default port number is 22. Enter an integer. |
Setting |
Description |
---|---|
Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor. You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab. |
Graph Type |
Define how this sensor shows different channels:
|
Stack Unit |
This setting is only visible if you select Stack channels on top of each other above. Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so. |
Setting |
Description |
---|---|
Result Handling |
Define what PRTG does with the sensor result:
This option is not available when the sensor runs on the hosted probe of a PRTG Hosted Monitor instance. In a cluster, PRTG stores the result in the PRTG data directory of the master node. |
By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click under the corresponding setting name to disable the inheritance and to display its options.
For more information, see section Inheritance of Settings.
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
Channel |
Description |
---|---|
Downtime |
In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status. |
Free INodes [Mount] |
The free index nodes for the mount (%) UNIX file systems only allow a limited number of index nodes. If the limit is exceeded, no more data can be stored, although free space might still be available. This sensor informs you before one of your drives runs out of INodes. |
KNOWLEDGE BASE
What are beta sensors and how can I use them?
What security features does PRTG include?